The Chematur Engineering group of companies provides the chemical industry with process plants based on proprietary as well as licensed supercritical-fluid technologies. The range of equipment and applications include supercritical carbon dioxide and supercritical water oxidation (SCWO). The Chematur Engineering demonstration plant for SCWO is described in detail; and results from some treatability studies are given; including the treatment of de-inking sludge and sewage sludge. The results clearly show that SCWO is a very effective method for the treatment of sludge.